Originally Posted by
CharlesS
Go to /Library/Caches and delete everything that starts with com.apple.LaunchServices. Then reboot and your problem should hopefully go away.
Thanks for the help CharlesS, good try!
Followed your steps, fixed problem for about an hour. Then suddenly iconsa are corrupt again. One major pain with this is that once this happens the main icons that become corrupted are those associated with old classic app files (we have lots of quark 4/5 docs in the office as our old G4's are still running 4/5 for clients who need jobs in that app.
Whenever you navigate to a folder with a corrupt classic app icon in it the OSX app instantly quits. It's very frustrating as it's easy to go to opena photoshop doc, forget to save some work, and stumble across a corrupted icon in the open dialogue and see photoshop and all your work go pop! I know, saving is the (part) answer but sometimes you do forget.
Both my MAc mini and MPB behave identically in this respect. A full restart does not normally fix the icons.